Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/webaudio/AudioProcessingEvent.h

Index: Source/modules/webaudio/AudioProcessingEvent.h
diff --git a/Source/modules/webaudio/AudioProcessingEvent.h b/Source/modules/webaudio/AudioProcessingEvent.h
index db7ed74c4b09cad38136d657fba11424b9476000..d844c794cb447ac7a8e9c15ceffeaf09898742e0 100644
--- a/Source/modules/webaudio/AudioProcessingEvent.h
+++ b/Source/modules/webaudio/AudioProcessingEvent.h
@@ -33,12 +33,12 @@
 namespace WebCore {
 
 class AudioBuffer;
-    
+
 class AudioProcessingEvent : public Event {
 public:
     static PassRefPtr<AudioProcessingEvent> create();
     static PassRefPtr<AudioProcessingEvent> create(PassRefPtr<AudioBuffer> inputBuffer, PassRefPtr<AudioBuffer> outputBuffer);
-    
+
     virtual ~AudioProcessingEvent();
 
     AudioBuffer* inputBuffer() { return m_inputBuffer.get(); }